.as {
  color: rgb(4, 138, 255);
  font-size: 50px;
  text-shadow: 0px 0px 5px red;
  background-color: brown;
  border: 1px solid #000;
  width: 500px;
}

html {
  transition: all 1s;
}
.app {
  /* height: 5000px; */
}
* {
  padding: 0;
  margin: 0;
}